Hi All.... Just purchased a 2008 Limited last week and love it.  Vapor Silver, Char Black interior. 
I went with the 20" Chrome wheels because the sticker says: 20" Wheels/Sport Suspension" and was more interested in getting a sport suspension than the 20" wheels. 
Does anyone know if there really is a difference in the suspension with the 20"  wanna be chrome wheels - vs - the suspension that comes with the 18" wheels? 
Thanks everyone !